refactor(electron): major ui refactor into modules

electron/main/file-dialogs.js

@@ -0,0 +1,60 @@
+const { ipcMain, dialog, BrowserWindow } = require('electron');
+
+const setupFileDialogHandlers = () => {
+  // File selection dialog
+  ipcMain.handle('select-file', async () => {
+    const result = await dialog.showOpenDialog({
+      properties: ['openFile'],
+      filters: [
+        { name: 'Fbundle Archives', extensions: ['fbundle'] },
+        { name: 'All Files', extensions: ['*'] }
+      ]
+    });
+    
+    if (!result.canceled && result.filePaths.length > 0) {
+      return result.filePaths[0];
+    }
+    return null;
+  });
+
+  // Directory selection dialog
+  ipcMain.handle('select-directory', async () => {
+    const result = await dialog.showOpenDialog({
+      properties: ['openDirectory']
+    });
+    
+    if (!result.canceled && result.filePaths.length > 0) {
+      return result.filePaths[0];
+    }
+    return null;
+  });
+
+  // Save file dialog
+  ipcMain.handle('select-save-file', async () => {
+    const result = await dialog.showSaveDialog({
+      filters: [
+        { name: 'Fbundle Archives', extensions: ['fbundle'] }
+      ]
+    });
+    
+    if (!result.canceled) {
+      return result.filePath;
+    }
+    return null;
+  });
+
+  // Generic save dialog with options
+  ipcMain.handle('show-save-dialog', async (event, options) => {
+    const result = await dialog.showSaveDialog(BrowserWindow.fromWebContents(event.sender), options);
+    return result;
+  });
+
+  // Error dialog
+  ipcMain.on('show-error-dialog', (event, { title, content }) => {
+    dialog.showErrorBox(title, content);
+  });
+};
+
+module.exports = {
+  setupFileDialogHandlers
+};